TB 9-6625-1959-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Leveled Sine Wave Generator, Tektronix, Type SG-503. The manufacturer's
manual was used as the prime data source in compiling these instructions. The equipment
being calibrated will be referred to as the TI (test instrument) throughout this bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately
4 hours, using the dc and low frequency technique.
2. Forms, Records, and Reports
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. When adjustments are in tables the (R) follows the designated adjustment.
Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument
Parameter
Performance specifications
Frequency
Range: 250 kHz to 250 MHz, +50 kHz reference frequency
Amplitude
Range: 5 mV to 5.5 V p-p over 3 decade ranges and
terminated into a 50 load
Accuracy: (at 50 kHz reference frequency)
X1 range:
3% of indicated amplitude
X.1 range:
4% of indicated amplitude
X.01 range: 5% of indicated amplitude
Harmonic content (harmonic
suppression relative to fundamental)
At least 35 dB down
Second harmonic
At least 40 dB down
Third and higher harmonics
Flatness
Range: 250 kHz to 250 MHz (50 kHz reference)
Accuracy: 250 kHz to 100 MHz, 1.5%
100 to 250 MHz, 3.0%